Dust effects on the derived Sérsic indexes of disks and bulges in spiral galaxies

We present a theoretical study that quantifies the effect of dust on the derived Sérsic indexes of disks and bulges. The changes in the derived parameters from their intrinsic values (as seen in the absence of dust) were obtained by fitting Sérsic distributions on simulated images of disks and bulge...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2011-09, Vol.7 (S284), p.306-308
Main Authors: Pastrav, Bogdan A., Popescu, Cristina C., Tuffs, Richard J., Sansom, Anne E.
Format: Article
Language:English
Subjects:
Accretion disks
Astrophysics
Contributed Papers
Stars & galaxies
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Summary:We present a theoretical study that quantifies the effect of dust on the derived Sérsic indexes of disks and bulges. The changes in the derived parameters from their intrinsic values (as seen in the absence of dust) were obtained by fitting Sérsic distributions on simulated images of disks and bulges produced using radiative transfer calculations and the model of Popescu et al. (2011). We found that dust has the effect of lowering the measured Sérsic index in most cases, with stronger effects for disks and bulges seen through more optically thick lines of sight.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921312009313